Machine for making paper tubes



Jan. 9, 1923-. 1,441,266.

G. H. WOMEL'SDORF.

MACHINE FOR MAKING PAPER TUBES. FILED DEC.19. 1919. a SHEETS-SHEET 1.

Men/2 2771- rk ryafl 5 Zia (7 W MM Jafi. 9, 1923.

3 SHEETS-SHEET 2.

F |LED DEC-19,1919.

Jan. 9, 1923.

G. H. WOMELSDORF. MACHINE FOR MAKING PAPER TUBES.

3 SHEETS-SHEET 3- FILED DEC. 19, I919.

Patented Jan: 9, 1923.

arr-es:

MACHINE FoaMAKrivG P PER TUBES.

v Applicationjfile'd December 19, 1919. SrialNo. 346,026;

T 0 oil whom it'may concern:

Be it known that I, GEORGE H. VVoMELs- DORF, a citizen ofthe United Statesresiding in Philadelphia, Pennsylvania, have invented Machines for hialring Paper Tubes, of whichthe following is a specification.

@ne'object of my invention is to provide a relativelysimple, compact and: substantial device for 'rolling'up a previously formed length of sheet material to form a frusto conical tube'which may serve asithebody of a container; the invention more'parti'cularly contemplating-novel means for automatically feeding and guiding the strip around a mandrel and for retaining it thereon during the Winding operation.

My invention further contemplates novel mechanism for insuring the entrance of a length of strip material betweena pairof winding rolls and thereafter so actuating said rolls as'to cause them'to grip the material, together With a mandrel of novel construction for holding the strip in place dur ingthe first p'art'ofthe winding operation.

Ialso desiret'o provide novel means for trimmingitheends of a rolled up body of sheet material, particularly when suchbodv "has a frusto-conical form, together :with' novel means for preventing the entrance between the feeding rolls of a second length of strip material as long as a previously delivered length of such material or the "tubular body formed therefrom, remains upon the mandrel;

Anotherobject of my invention is toprovide a machine having coacting taperedrolls mounted in such amanner as to cause a curved length of sheet material to be gripped and with the aid of suitable guidin means,

to be formed into'a frusto-conical tube.

These objects and other advantageous ends I attain as hereinafter set forth, reference beinghad to the accompanying drawings, in

which, j v

' Figs; 1 and 2 are respectively a side and a front elevation of a machine constructed in accordance with my invention; Fig. 3 is a plan of themachine shown in Fi 'sfll and 2; V

fig. 4 is a longitudinal section on a larger scale than Figs. 1 to 3 inclusive, illustrating the detail construction of the winding roll or mandrel;

27 and suitablesprock et Wheels.

Fig.6 'is a on a reduced'scalaillustrating the form of blankstrips whichthe machine is designed to operate upon; and.

Fig. 6isa perspectiveview of the'tinished tube or container bodymade by my machine.

lntheabove drawings 1 represents a supporting base to which is suitably fixed a frame ,2 providing a pair of bearings for the. receptionof a shaft 5 to whichis fixeda 'driving'pulley7 anda bevelled gear 8. Said "frame also includes a fixedexten sion, aboveone of th'ezbearings 3 having a guideway for a 'bearing'lfi' 'in which isrotatably' mounted one end'of asecond shaftG; The opposite end of this shaft which' extends above and at an acute angle tothe shaft 5', is supported in a fsecond bearing 13 vertically slidable in a guidewaypro vided in a lever 12 fulcrumedfby a pin 13 to a pair of lugs constituting part of the frame 2'.

Two springs, of which one is sliownat 14, are mounted'between the bearings l6 and 13 and the upper ends o f thei'r respective guidew-ays, and adjusting screws 15 and 17 are provided I "for varying the pressure exerted by said" springs upon "theirr'espec tive bearings. The sli aft lOfonthe outer side of' its bearin'g' 13 has fixedto it"a frustoconicalroll l0 designed to cooperate with a second frusto=conical ortapered" roll 11, fixed to the adjacent endof the shaft 5. which hzISilXG Cl tOlt a bevelledgear 8 mesh ing with asecond bevelled gear Q'fiXed to the shaft 6. i

The lever '12 is extended on that side-of the roll 10' opposite its'fulcrum' 13 andh'as' its free end pivoted at 19 to a toggle lever 18, one of whose arms is pivotedat 20- to the lower end of 'a'link 2'1 whose upper end is pivoted at 22to a'standard28pi'ojecting upwardly fromthe -ba'se 1. "The'second arm of the toggle lever 18 is provided with a roller 24: designed to cooperatewith acain 25 fixed to a cam shaft QG-andthis is driven from the shaft '6 through a sprocket chain A, strip-supporting feed table 28 is carried by the frame '2 on one side and at the level of the top of the roller llyon whose opposite side is mounted a guide 291"01 directing a strip-of material aidown around said roll after it has passed between it and the roll 10. This strip guide includes a relatively sharp edge 30 parallel with and immediately adjacent the nearest portions of the two rolls 10 and 11 and carries a series of frusto-conical pressure rolls 31 positioned to engage the strip or tube on the roll 11 when this is desirable.

The guide structure 29 is mounted on one end of a tubular member 32slidable in a guideway 33 and designed fol-the reception of one end of a plunger 34 whose opposite end carries a roller 35 cooperating with a cam 36 on the shaft 26, there being a spring 37 within the member 32 acted on by the plunger 34. lVith this construction the strip guide 29 under certain conditions is yieldingly pressed toward the roll or mandrel 11 so that its rollers 31 forcibly press upon the surface of a strip being wound on said mandrel.

Immediately under the table 28 is mounted an adhesive container 40 having within it a roll 41 constantly immersed to a greater or less extent in the adhesive and engaging the surface of a second roll 42 mounted on a pair of arms 43 pivoted coaxially with the first roll 41 ;the arrangement being such that the roll 42 may be moved into and out of engagement with the strip being wound upon the mandrel 11.

For actuating the swinging arms 43 and moving the roll 42 into and out of operative position, I provide a lever 44 pivoted to a suitable supporting standard 45 and having one end connected to said arms 43 while its second end carries a roller 46 cooperating with a cam 47 on the cam shaft 26;the arrangement being such that said lever is periodically swung on its fulcrum to accent plish the result desired.

In order to trim the ends of a tube wound on the mandrel 11, I provide a forked lever 48 fulcrumed on a standard 4 and having journalled in its branches two short spindles 49 and 50 respectively having fixed to them rotary cutters 51 and 62 so positioned as to cooperate with the mandrel l1 zuljzu-ent the ends thereof in cutting or trimming the tube wound thereon. The spindle 49 For the cutter 51 is operat-ively connected to the spindle 50 through an intermediate spindle 53 and two universal joints, and said spindle is driven from the shaft 5 through a pair of coacting gear wheels 54 and 55.

That end of the lever 48 distant from that supporting the cutters carries a'roller placed to cooperate with a cam 57 on the cam shaft 26, so that at certain predetermined intervals said lever is turned on its fulcrum and its cutters 51 and 52ers caused or are in process of operating upon a previously fed strip, I provide a stop in the form of a finger 6O normally projecting across the table 28 to a greater or less extent immediately adjacent the roll 10. This stop is carried upon the end of a vertically ertending rod 61 whose lower end is connected to a lever 62 fulcrumed to a standard 68 on the base 1 and having its opposite end extended in position to cooperate with a cam 64 on the shaft 26.

The mandrel 11 is preferably tubular and has a number of closely spaced, substantially radial passages 66 extending from its external surface into its cavity 67 whose outer end is closed by a plug 68 and whose inner end communicates through an axial passage 69 and radial passages 70 in the shaft 5, with a relatively fixed hollow collar 71 whose cavity in turn is connected to any suitable exhausting device such as a suction pump or fan.

Under conditions of operation the driving pulley '7 is turned by power from a suitable source so that the shafts 5, 6 and 26 are continuously rotated, as are also the spindles 49 and 50 with their associated cutters. At the beginning of a cycle of operations the cams on the shaft 26 are so designed and arranged that the adhesive applying roller 42 is held out of engagement with the mandrel 11 by the action of the sprii'ig 73, the guiding member 29 is in such a position that its pressure rolls 31 are clear of said mandrel or but lightly engaging the same, the cutters 51 and 02 are in their lower positions out of engagement with the mandrel, the stop 60 is raised above the table 28 and the lever 12 is in such a position that the upper roll 10 is spaced from the mandrel 11.

The blanks employed in my machine are preferably strips of paper of predetermined length having a circular curvature, and one of these after being placed upon the table 28 in the position indicated in Fig. i), is led between the rolls l0 and 11, just as the cam 25 so acts on. the toggle lever 18 as to depress the lever 12 and move the upper one (it said rolls toward the other. As a consequence, the strip is gripped and as it is drawn between the rolls, its end is directed downwardly around the roll or mandrel 11 by the sharp edge 30 of the strip guide 29, so that it passes between the latter and the pressure rolls 81. At the same time the air is exhausted from the interior of the mandrel 11 through the collar 71 so that th s end of the strip is drawn and held in close engagement with the tapered surface of the roll and as it passes under the roller 42, this is depressed into engagement with it thereby applying to its external surface adhesive received "from the gathering roll 41 for which purpose the can) 47 depresses the adjacent end of the lever 44 so as to swing the arms J ll) e to the best advantage.

in therequired direction to bring saidrroll 42 into engagement with the strip on the mandrel.

As the two coacting rolls 10 and 11 con-l tinue to turn, the strip is further drawn between them and is wound upon the lower one, its successive layers being pressed. into the most intimate engagement with each other by the pressure rolls 31 so that the adhesive applied by the roller 42 is utilized Just before the final complete layer of the strip is wound upon the mandrel, the cam 47 so far releases the lever 44 as to allow its adjacent end to rise, thus causing the roll 42 to move out of engagement with the tubular body on the mandrel or roll 11. As a consequence the ex ternal surface of the finished. body 0& has no paste applied to it.

After the second end of the strip a: has passed between the rolls l0 and 11; the cam 64 releases the lever 62 so as to permit the stop 60 to move down andinto engagement with the top of the table 28, thus preventing I another strip being fed into the rolls. The

cam 57 now acts on the roller carried by the lever 48 to bring the two cutters 51 and 52 into positions inwhich they cooperate with the mandrel 11 to trim the ends of the tubular body thereon so that the edges of its convolutions are flush andlie in two parallel planes. These cutters remain in their operative positions, for one full'revolution of the mandrel 11 after which the lever 48 is released by its cam 57 permitting them to move away from the body 50 At the same time the cam 25 releases the lever 12 and the cam 36 releases the strip guide 29 with its pressure rolls 31, so that the finished tube 00 may beeasily removed. from the mandrel 11 ;it'

being noted'that previously to this the suction is cut off in any suitable manner from the collar 71 and from the interior of said mandrel.

Thereafter the cam 64 acts upon the lever 62 to raise the stop 60 above the table 28 the lever 12 is again moved down so as to bring the upper roll 10 into cooperative position relatively to the mandrel l1 and the cam 36 acts upon the roller 35 to force the plunger as it is being wound to press its successive layers into the most intimate contact and finally the ends of the finished tube or body are trimmed to parallelism.

- with the proper cooperation of the gears 54 The various parts are so disposed asto permit of the quick and convement removal ofthe finished tube from its mandrel and likelihood of damage to the machine or marring of a. partially finished body is prevented by the automatically acting stop which makes it'impossible to feed a second strip into the machine while the prevlous strip is being wound.

It will be understood that the movement ofthelever12 is relatively slight so that the proper cooperation of the gears 8 and 9 is and 55;

I claim:

1. The combination in a tube forming machine of a supporting structure; two coacting tapered rolls thereon; means for driving the rolls; a device for curving a striparound one of the rolls after it is fed betweenthe same; and means for fastening together they overlying layers of the strip woundon said the rolls; a device for curving a strip-around,

one of the rolls after it is fed between it and the other roll; the same consisting of a guide ad acent the coating portions of the rolls and means for bodily moving said device toward and from one of'the rolls.

The combination in a tube winding ma chine of a pair of coacting tapered rolls;

means for driving the rolls; a guide-having an edge extending adjacent the coactingportions of the rolls for directing a strip around one of the latter; and pressure rollers carried by said guide in engagement with said 4. The combination in a tube winding machine of a pair of coacting tapered, rolls; means for driving the rolls; guide having an edge extending adjacent the coacting portions of the rolls for directing a strip around one of them; pressure rollers carried by said guide in engagement with said roll with Y cam controlled mechanism for governing the position of said guide relative to the roll.

5. The'combination in a tube winding machine of a pair of coacting tapered rolls; means for driving said rolls; means for directing around one of the rolls a sheet of paper fed between them; and means for antomatically separating the rolls after the completion of the tube.

6. The combination in a tube winding machine, of a pair of driven shafts supporting a pair of coacting tapered rolls, means for directing around one of the rolls a sheet of paper fed between them for the formation of a ta ered tube, and means for automatically shifting one of the shafts to separate the rolls after completion of the tube.

'7. The combination of supporting struc true; a pair of coacting tapered rolls; a lever fuicrumed to said structure and opera tive on one of the rolls to its position relatively to the other roll; mechanism operative on the lever to move its roll toward from the other roll; and means for directing; a strip around one of the rolls after it has passed between it and the other roll.

The combination of a supporting structure; a pair of coacting tapered rolls; a lever fuicruined to said structure and opera tire on one of the rolis to govern its position reiativei to the other roll; mechanism operative on the lever to more its roll toward and from the other roll; a device for directing a strip around one of the rolls after it has passed b "ween it and the. other roll; and means for temporariiy moving said device sway from its roll to permit of the introduction of the strip.

9. he combination in a tube wind inp' machine of two ,coa 1g; rolls; means for causing a strip to be directed around one of the rolls; means for causing the convolutions of said strip to be held together; and a device for trinnning; the ends of the finished tube consisting of a movable member cutters carried by th member; and means for automatically moving the member with the out tors toward and from a tube to be trimmed.

10. The combination in a tube winding machine of a pair of coacting tapered rolls; means for causing a strip passing between the rol s to be wound on one o-fthen'i; means for applying adhesive to the strip as it is wound, on the roil to cause its convolutions to adhere; a lever; a pair of cutters mounted on the lever; and mechanism for periodicaliv and a: ion'iaiicall actuatingthc lever to cause the cutters carried thereby to trim ends of a tube on the roll.

ii. The combination in a tube winding machine of a pair of coacting rolls; u'ieaus directing a length of strip material around one of the rolls after it has been passed between said rolls; cam shaft; means for driving the rolls and the camshaft; a series of pressure rolls mounted to enact th one of said first rolls; a structure carrying: said pressure rolls; and a cam on the cam shaft for causing said structure with its rolls to be periodically moved into and out of enacting position.

12. The combination in a tube winding machine of a pair of eoacting rolls; a cam shaft; a lever operative upon one of said rolls to vary its distance from the other roll; and acam on the cam shaft for periodically turning the lever on its fulcrum to vary the separation of the two rolls.

13. The combination in a tube winding machine of a pair of coacting rolls of which one has a series passages opening on its surface and connected to an air exhausting device; a cam shaft; means for directing; around one of the rolls a piece of strip ma terial fed between said rolls; a cam on the cam shaft controlling said directing means; a device for applying adhesive to a strip; a second cam on the cam shaft for governing); the operation of said latter device, cutters for trimming the ends of a tube on one of the rolls; and a third cam on the cam shaft for controlling the oper: tion said cutter.

14s. The combination in a tube winding machine of a pair of coasting rolls of which one has a series of passages opening on its surface and connec ed to an air exhausting device; a cam shaft; means for directing around one of the rolls a piece of strip material fed between said rolls; a cam on the cam shaft controlling said directing means; a device for applying adhesive to a strip; a second cam on the cam shaft for governing the operation of said device; cutters for trimming; the ends of a tube; a third cam on the cam shaft for controlling the operation of said cutters a device for moving one of the rolls into and out of position to cooperate with the other roll; and a fourth cam on the cam shaft for controlling the operation of said last device.

15. The combination in a tube windingmachine of a pair of coacting rolls; means for guiding a strip of material around one of the rolls after it has been passed between said rolls; and a stop for preventing the introduction of a second sheet between the rolls until the finished tube has been removed from its supporting roll.

16. The combination in a tube winding machine of apair of coax-ting tapered rolls: a table adjacent the line of coaction of the rolls; means for directing a strip of material fed from the table ound one of the rolls; and an automatic stop operative adjacent the table for preventing the introduction of a second sheet until the tube has been removed from the roll on which it is wound.

In witness whereof I affix my signature.

GEORGE H. VOMELSDORF. 

